Capacity Enhancement in Quasi-Solid-State Lithium-Oxygen Batteries via Self-Constructing Li<sup>+</sup> Transport Channels.
basic_science · Level V
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- Record sourced from PubMed, PMID 40186575.
- Also identified by DOI 10.1021/acs.nanolett.5c00870.
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Abstract
Lithium-oxygen batteries (LOBs) attract widespread attention due to their high energy density and safety. The morphology of the solid discharge product bears a close correlation with the battery capacity. In this work, the capacity of LOBs surprisingly increases from 790 mAh g<sup>-1</sup> under the liquid electrolyte to 2395 mAh g<sup>-1</sup> by using a quasi-solid-state electrolyte (QSSE). The thin film and spherical Li<sub>2</sub>O<sub>2</sub> under the QSSE system construct new Li<sup>+</sup> transport channels, which help to extend the solid-phase Li<sup>+</sup> transport boundary to the entire electrode to enhance the spatial utilization efficiency of the electrode. Furthermore, a novel mechanism for the growth of Li<sub>2</sub>O<sub>2</sub> is proposed, which is determined by the coupling of the conductivity of Li<sup>+</sup> and electrons within the products and the electrode. The result innovatively reveals a new mechanism for the growth of discharge products and a new model of Li<sup>+</sup> conduction in LOBs under QSSE systems.